123AB,
Re: Contact
When I made a mistake on my form last year they didn't contact me by phone or e-mail, they just returned my whole package. About 2 months after I re-submitted it I received my documents and a receipt with my case number in the post. I could use that case number to add information to my file or contact them about a specific query using the webform on the CIC London webpage. They will not answer any general query about your application status until 10 weeks have passed. Trust me on that one. Before 10 weeks they will disregard any e-mail/letter of that nature. After 10 weeks they will answer any question about how long it's going to take for your application to be processed and they will be very helpful. I don't think we can contact them by phone, but I am not certain about that.
Giri, sorry - I don't know the answer to your question, but I am sure someone else will know.